One-way valve

Abstract

A double diaphragm pump including an air manifold, two air chambers to either side of the air manifold, two pump chambers to either side of the air chambers and diaphragms extending between the air chambers and pump chambers are stacked together in horizontal assembly. Intake and discharge manifolds span this distance to intake and exhaust ports associated with the pump chambers. One-way valves having valve bodies with passages therethrough are arranged between the manifolds and the pump chambers. The valve bodies have inlet mounting surfaces and outlet mounting surfaces with circular attachment flanges radially extending from these mounting surfaces. The circular attachment flanges each define a central axis which on each valve body are parallel and laterally displaced from one another. Concavities extend inwardly from the valve bodies from the inlet and outlet mounting surfaces. The angle between the central axis in the direction of the adjacent mounting surface and the surface of either concavity is acute and does not exceed approximately 60°.

1. A one-way valve comprising
 a valve body including an inlet mounting surface, an outlet mounting surface, a passage extending between the mounting surfaces and two circular attachment flanges radially extending from the mounting surfaces, the circular attachment flanges each defining a central axis, the central axes being parallel to and displaced laterally from each other, the passage defining two concavities from the mounting surfaces with the surface of each concavity always forming an acute angle with the central axes in the direction of the mounting surface adjacent the concavity; 
 a valve element positioned to rest in the concavity which is adjacent the outlet mounting surface. 
 
   
   
     2. The one-way valve of  claim 1 , each of the concavities being conical. 
   
   
     3. The one-way valve of  claim 1 , the passage further defining a cylindrical section extending between the concavities. 
   
   
     4. The one-way valve of  claim 1 , the diameters of the circular attachment flanges being equal. 
   
   
     5. The one-way valve of  claim 1 , the acute angle being no greater than about 60°. 
   
   
     6. The one-way valve of  claim 1 , the valve element being a ball. 
   
   
     7. The one-way valve of  claim 1 , the valve element being a mushroom valve element. 
   
   
     8. The one-way valve of  claim 1 ,the valve element being a flap valve element pivotally mounted to the valve body. 
   
   
     9. The one-way valve of  claim 1 , the passage including no surfaces creating quiescent areas in flow through the passage. 
   
   
     10. A pump comprising
 two pump chambers; 
 a manifold in communication with each of the pump chambers; 
 two valve bodies positioned between the manifold and the pump chambers, respectively, and each including an inlet mounting surface, an outlet mounting surface for mounting between the respective pump chamber and manifold, a passage extending between the mounting surfaces and two circular attachment flanges radially extending from the mounting surfaces, the circular attachment flanges each defining a central axis, the central axes being parallel to and displaced laterally from each other, the passage defining two concavities from the mounting surfaces with the surface of each concavity always forming an acute angle with the central axes in the direction of the mounting surface adjacent the concavity; 
 valve elements positioned to rest in the concavities which is adjacent the outlet mounting surface. 
 
   
   
     11. The pump of  claim 10 , the manifold being a discharge manifold. 
   
   
     12. The pump of  claim 10 , the manifold being an inlet manifold. 
   
   
     13. The pump of  claim 10  further comprising
 band clamps about the circular attachment flanges. 
 
   
   
     14. The pump of  claim 10 , each of the concavities being conical. 
   
   
     15. The pump of  claim 10 , the passage further defining a cylindrical section extending between the concavities. 
   
   
     16. The pump of  claim 10 , the diameters of the circular attachment flanges being equal. 
   
   
     17. The pump of  claim 10 , the acute angles being no greater than about 60°. 
   
   
     18. The pump of  claim 10 , the valve elements each being a ball. 
   
   
     19. The pump of  claim 10 , the valve elements each being a mushroom valve element. 
   
   
     20. The pump of  claim 10 , the valve elements each being a flap valve element pivotally mounted to the valve bodies, respectively. 
   
   
     21. The pump of  claim 10 , the passages including no surfaces creating quiescent areas in flow through the passages. 
   
   
     22. A double diaphragm pump comprising
 an air manifold; 
 two air chambers, the air manifold being between the two air chambers; 
 two pump chambers, the two air chambers being between the two pump chambers, the pump chambers each having an intake port and an exhaust port, each port having a circular attachment flange radially extending from the port; 
 diaphragms between the pump chambers and the air chambers, respectively; 
 an inlet manifold including two inlet manifold ports in communication with the pump chamber intake ports, each inlet manifold port having a circular attachment flange radially extending from the inlet manifold port and an inlet to the inlet manifold in communication with the inlet manifold ports; 
 a discharge manifold including two discharge manifold ports in communication with the pump chamber exhaust ports , each discharge manifold part having a circular attachment flange radially extending from the discharge manifold part and a discharge from the discharge manifold in communication with the discharge manifold ports; 
 four valve bodies positioned between the manifold and the pump chambers, respectively, and each including an inlet mounting surface, an outlet mounting surface for mounting between the respective pump chamber and manifold, a passage extending between the mounting surfaces and two circular attachment flanges radially extending from the mounting surfaces, the circular attachment flanges each defining a central axis, the central axes being parallel to and displaced laterally from each other, the passage defining two concavities from the mounting surfaces with the surface of each concavity always forming an acute angle with the central axes in the direction of the mounting surface adjacent the concavity; 
 valve elements positioned to rest in the concavities which is adjacent the outlet mounting surface. 
 
   
   
     23. The double diaphragm pump of  claim 22  further comprising band clamps about mating palm of the circular attachment flanges. 
   
   
     24. The double diaphragm pump of  claim 22 , each concavity being conical. 
   
   
     25. The double diaphragm pump of  claim 22 , each passage further defining a cylindrical section extending between the concavities. 
   
   
     26. The double diaphragm pump of  claim 22 , the diameters of the circular attachment flanges being equal. 
   
   
     27. The double diaphragm pump of  claim 22 , the acute angles being no greater than about 60°. 
   
   
     28. The double diaphragm pump of  claim 22 , each valve element being a ball. 
   
   
     29. The double diaphragm pump of  claim 22 , each valve element being a mushroom valve element. 
   
   
     30. The double diaphragm pump of  claim 22 , each valve element being a flap valve element pivotally mounted to one of the valve bodies, respectively. 
   
   
     31. The double diaphragm pump of  claim 22 , the passages including no surfaces creating quiescent areas in flow through the passages.